Mmmmm, I know how it feels to have your posts ignored, it's not very nice, and it makes you feel like nobody's really bothered with you, or doesn't care about you, especially if you need someones help. I once asked for help on the help thread and got no replys, so I had to figure it out myself.
It is pretty sad when you see it, and y'know what? I usually see it on the threads created by new, or not very known members, like no one cares about them, hey want to post on the popular peoples threads, it's really sad, extremely sad.